Dustproof brushless motor

Abstract

The utility model relates to a dustproof brushless motor in the field of brushless motors, which comprises a shell and an end cover arranged at one end of the shell, an upper frame and a lower frame are arranged in the shell, a plurality of positioning insertion buckles are formed on the surface of the upper frame, a dustproof filter screen is clamped on the positioning insertion buckles, filter holes are formed in the surface of the dustproof filter screen, and the end cover is arranged at the other end of the shell. A positioning clamping groove is formed in the surface of the dustproof filter screen, a buckle is formed on the side face of the lower frame, a circuit board is clamped to the buckle, mounting holes are formed in the outer surface of the shell in a surrounding mode, a base is connected to the mounting holes through bolts, and the side face of the base makes contact with the surface of the end cover through a sealing gasket. The dustproof filter screen enables the interior of the motor to be effectively isolated from external dust, the filter holes in the dustproof filter screen can guarantee air circulation and prevent dust from entering, the dustproof effect of the brushless motor is improved, the sealing performance between the end cover and the base is improved through the sealing gasket, and therefore the sealing and dustproof effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of brushless motors, specifically to a dustproof brushless motor. Background Technology

[0002] Brushless motors, as a new type of motor, have been widely used in many fields due to their advantages such as high efficiency, low noise, and long lifespan. Among them, brushless DC motors, with their stable DC output characteristics, have become the preferred power source for many power tools, home appliances, automotive parts, and other products.

[0003] A brushless DC motor mainly consists of a stator, a rotor, an electronic commutator, and a position sensor. The stator is usually composed of an iron core and windings and is responsible for generating a magnetic field. The rotor is composed of permanent magnets or electromagnets and is responsible for rotating in the magnetic field. The electronic commutator is responsible for controlling the direction of current flow based on the signal from the position sensor, thereby realizing the continuous rotation of the rotor.

[0004] However, despite the many advantages of brushless DC motors, some problems still need to be solved in practical applications. In harsh working environments, such as dusty industrial sites, existing brushless motors have poor dust protection. They generally only have a housing and end caps to protect the internal components, but external dust can easily enter the brushless motor through the gaps, causing dust to accumulate inside. In addition, the poor sealing of existing brushless motors allows dust to easily enter the housing, affecting the internal components of the motor. This leads to poor heat dissipation, reduced efficiency, and even frequent failures, which is detrimental to the stable use of brushless motors and affects their practicality and reliability. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned defects and provide a dustproof brushless motor to address the technical problem that the sealing and dustproof effects of brushless motors in the background art are poor, which makes it easy for external dust to enter the brushless motor and affect its use.

[0006] The objective of this utility model is achieved through the following means:

[0007] A dustproof brushless motor includes a housing and an end cap disposed at one end of the housing. One end of the housing has an open opening. Inside the housing are an upper frame and a lower frame, connected to a stator core. Several windings are arranged around the stator core. A magnetic ring is coaxially connected inside the stator core, and a rotating shaft is connected to the magnetic ring via a bushing. Several positioning buckles are formed on the surface of the upper frame, and a dustproof filter is engaged with each buckle. The surface of the dustproof filter has several filter holes and positioning slots that match the positioning buckles. Several buckles extending towards the opening of the housing are formed on the side of the lower frame away from the stator core, and a circuit board is engaged with each buckle. The end cap is embedded in the opening of the housing, and the circuit board is located between the lower frame and the end cap. Several mounting holes are arranged around the outer surface of the housing, and a base is bolted to each mounting hole. The side of the base contacts the surface of the end cap via a sealing gasket.

[0008] Furthermore, as described above, the positioning buckles are arranged in a circumferential array on the surface of the upper frame, and several positioning blocks are formed on the edge of the upper frame. Several locking interfaces that match and engage with the positioning blocks are opened on the edge of the dust filter. The positioning buckles can be conveniently connected to the dust filter, thereby improving the dust filtration effect inside the brushless motor, reducing the intrusion of dust, and extending the service life of the brushless motor. The positioning buckles and positioning blocks also securely connect the dust filter to prevent accidental detachment.

[0009] Furthermore, as described above, the end face of the buckle is formed with an inclined portion, and the buckle contacts the surface of the circuit board. The surface of the circuit board is electrically connected to a terminal block, which extends through the end cover and the base to the outside of the housing, so that the circuit board can be easily snapped together with the buckle of the lower frame, thereby improving the installation and connection efficiency of the circuit board.

[0010] Furthermore, as described above, the surface of the end cap has a notch for mating the terminal block, and the surface of the base has a wiring port for mating with the terminal block. The end cap seals the opening of the housing, thereby providing sealing protection for the circuit board, reducing the corrosive effect of dust on the circuit board, and improving its stability in use.

[0011] Furthermore, as described above, the outer side of the base is provided with several threaded holes that match the mounting holes, and the edge of the base is formed with several protrusions. The surfaces of the protrusions are all provided with fixing holes for installation. The connected base facilitates the fixed installation with external equipment or mechanisms, making it convenient for the brushless motor to be installed and fixed. In addition, the side of the base contacts the surface of the end cover through a sealing gasket, thereby improving the sealing performance between the end cover and the housing opening, preventing dust from entering and improving the dustproof effect of the brushless motor.

[0012] Furthermore, as described above, a bearing is coaxially connected to the rotating shaft, and one end of the rotating shaft extends outward from the housing.

[0013] Furthermore, as described above, the end face of the housing is provided with vent holes, which serve to facilitate ventilation and heat dissipation.

[0014] The beneficial effects of this utility model are as follows: The dust filter effectively isolates external dust from the motor interior. The filter holes on the dust filter ensure airflow while preventing dust from entering, thereby reducing the amount of dust entering the components inside the housing, improving the dustproof effect of the brushless motor, and extending its service life. The combination of the positioning buckle and positioning slot makes the installation and removal of the dust filter simple and quick, facilitating disassembly, cleaning, or replacement. The buckle design on the side of the lower frame securely fixes the circuit board inside the housing, improving the stability and ease of installation of the circuit board, and ensuring the reliability of the brushless motor operation. The outer surface of the housing is connected to the base by bolts passing through the mounting holes. The sealing gasket on the side of the base improves the sealing between the end cover and the base, thereby enhancing the sealing and dustproof effect. Attached Figure Description

[0015] Figure 1 This is a perspective view of the front view angle in this embodiment;

[0016] Figure 2 This is a perspective view of the rear view in this embodiment;

[0017] Figure 3 This is a cross-sectional view of this embodiment;

[0018] Figure 4 This is a schematic diagram of the overall structure of this embodiment;

[0019] Figure 5 This is a partial structural diagram of this embodiment;

[0020] The reference numerals in the diagram are as follows: 1-Housing, 2-End cap, 3-Upper frame, 4-Lower frame, 5-Stator core, 6-Magnetic ring, 7-Shaft, 8-Positioning buckle, 9-Dust filter, 10-Filter hole, 11-Positioning slot, 12-Snap fastener, 13-Circuit board, 14-Mounting hole, 15-Base, 16-Sealing gasket, 17-Positioning block, 18-Card interface, 19-Terminal socket, 20-Connection port, 21-Threaded hole, 22-Protrusion, 23-Fixing hole, 24-Bearing, 25-Ventilation hole. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] In this embodiment, refer to Figures 1-5The present invention relates to a dustproof brushless motor, comprising a housing 1 and an end cap 2 disposed at one end of the housing 1. One end of the housing 1 has an open opening. Inside the housing 1 are an upper frame 3 and a lower frame 4. A stator core 5 is connected between the upper frame 3 and the lower frame 4. Windings are wound around the stator core 5. A magnetic ring 6 is coaxially connected inside the stator core 5. A rotating shaft 7 is connected inside the magnetic ring 6 via a bushing. A positioning buckle 8 is formed on the surface of the upper frame 3, and a dustproof filter 9 is engaged with the positioning buckle 8. The surface of the dustproof filter 9 has... The filter screen 9 has a filter hole 10 and a positioning slot 11 that matches the positioning buckle 8. The side of the lower frame 4 away from the stator core 5 has a buckle 12 that extends toward the opening of the housing 1. A circuit board 13 is snapped onto the buckle 12. The end cover 2 is embedded in the opening of the housing 1. The circuit board 13 is located between the lower frame 4 and the end cover 2. Four mounting holes 14 are arranged around the outer surface of the housing 1. A base 15 is connected to the mounting holes 14 by bolts. The side of the base 15 contacts the surface of the end cover 2 through a sealing gasket 16.

[0023] Positioning buckles 8 are arranged in a circumferential array on the surface of the upper frame 3. Positioning blocks 17 are formed on the edge of the upper frame 3. The edge of the dust filter 9 is provided with a card interface 18 that matches and engages with the positioning blocks 17. The positioning buckles 8 can be conveniently connected to the dust filter 9, thereby improving the dust filtration effect inside the brushless motor, reducing the intrusion of dust, and extending the service life of the brushless motor. The positioning buckles 8 and the positioning blocks 17 securely connect the dust filter 9 to prevent accidental detachment.

[0024] The end face of the latch 12 has an inclined portion, and the latch 12 contacts the surface of the circuit board 13. The surface of the circuit board 13 is electrically connected to a terminal block 19. The terminal block 19 extends outward from the housing 1 through the end cover 2 and the base 15, so that the circuit board 13 can be easily latched and connected to the latch 12 of the lower frame 4, improving the installation and connection efficiency of the circuit board 13. The surface of the end cover 2 has a notch for mating the terminal block 19, and the surface of the base 15 has a wiring port 20 for mating with the terminal block 19. The end cover 2 seals the opening of the housing 1, thereby sealing and protecting the circuit board 13, reducing the corrosive effect of dust on the circuit board 13, and improving its stability in use.

[0025] The outer side of the base 15 has four threaded holes 21 that match the mounting holes 14. The edge of the base 15 has four protrusions 22, each with a fixing hole 23 for mounting. The base 15 facilitates fixed installation with external equipment or mechanisms, allowing for easy installation and fixation of the brushless motor. The side of the base 15 contacts the surface of the end cover 2 via a sealing gasket 16, improving the seal between the end cover 2 and the opening of the housing 1, preventing dust ingress and enhancing the dustproof performance of the brushless motor. A bearing 24 is coaxially connected to the rotating shaft 7, and one end of the rotating shaft 7 extends outward from the housing 1.

[0026] The end face of the housing 1 is provided with a vent hole 25. The vent hole 25 serves to ventilate and dissipate heat, allowing air to enter the housing 1 through the filter hole 10 of the dust filter 9, carrying away the heat generated during operation. The filter hole 10 can also prevent dust from entering and maintain the normal operation of the motor.

[0027] The specific operating principle of this embodiment is as follows: the positioning slot 11 of the dust filter 9 is matched with the positioning buckle 8 of the upper frame 3, making the installation and removal of the dust filter 9 simple and quick, and convenient for disassembly, cleaning or replacement. The dust filter 9 can effectively isolate external dust inside the motor. The filter holes 10 on the dust filter 9 can ensure air circulation while preventing dust from entering, thereby reducing the amount of dust entering the components inside the housing 1 and improving the dustproof effect of the brushless motor. The circuit board 13 is fastened to the buckle 12 of the lower frame 4, so that the circuit board 13 is firmly fixed inside the housing 1, improving the stability and ease of installation of the circuit board 13. The outer surface of the housing 1 is connected to the base 15 by bolts passing through the mounting hole 14. The sealing gasket 16 on the side of the base 15 makes it contact the surface of the end cover 2, thereby improving the sealing between the end cover 2 and the base 15, enhancing the sealing and dustproof effect of the end cover 2, and improving the service life of the brushless motor.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A dustproof brushless motor, comprising a housing and an end cap disposed at one end of the housing, the end of the housing having an open opening, an upper frame and a lower frame disposed inside the housing, a stator core connected between the upper frame and the lower frame, a plurality of windings being arranged around the stator core, a magnetic ring being coaxially connected inside the stator core, and a rotating shaft being connected inside the magnetic ring via a bushing, characterized in that: The surface of the upper frame has several positioning buckles, and a dust filter is snapped onto the positioning buckle. The surface of the dust filter has several filter holes and a positioning slot that matches the positioning buckle. The side of the lower frame away from the stator core has several buckles extending toward the housing opening. A circuit board is snapped onto the buckle. The end cover is embedded in the opening of the housing. The circuit board is located between the lower frame and the end cover. The outer surface of the housing has several mounting holes. A base is connected to the mounting holes by bolts. The side of the base contacts the surface of the end cover through a sealing gasket.

2. The dustproof brushless motor according to claim 1, characterized in that: The positioning buckles are arranged in a circumferential array on the surface of the upper frame. Several positioning blocks are formed on the edge of the upper frame, and several card interfaces that are matched and engaged with the positioning blocks are opened on the edge of the dust filter.

3. The dustproof brushless motor according to claim 1, characterized in that: The end face of the buckle is formed with an inclined portion, and the buckle is in contact with the surface of the circuit board. The surface of the circuit board is electrically connected to a terminal block, which extends through the end cover and the base to the outside of the housing.

4. The dustproof brushless motor according to claim 3, characterized in that: The surface of the end cap has a notch for mating the terminal block, and the surface of the base has a wiring port for mating with the terminal block.

5. A dustproof brushless motor according to any one of claims 1-4, characterized in that: The outer side of the base has several threaded holes that match the mounting holes, and the edge of the base has several protrusions, each of which has a fixing hole for installation.

6. A dustproof brushless motor according to any one of claims 1-4, characterized in that: A bearing is coaxially connected to the shaft, and one end of the shaft extends outward from the housing.

7. A dustproof brushless motor according to any one of claims 1-4, characterized in that: The end face of the shell is provided with a vent hole.

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